Table 7.
Predictive marginal analysis of the tMD* impact of changing physician n and shift time of day.
| On-duty physician staffing level | tMD (min), adjusting for other covariates (margin with 95% CI* *) | tMD difference (95% CI) |
|
| ||
| Physicians on duty | ||
|
| ||
| < 22 | 49.6 (46.6–52.7) | 6.5 (2.2–10.9) min longer than 22 or more physicians |
|
| ||
| 22 | 44.0 (39.2–48.9) | 1.4 ( − 4.7 to 7.6) min longer than >22 physicians |
|
| ||
| >22 | 42.6 (39.0–46.3) | – |
|
| ||
| Shift time of day | ||
|
| ||
| Day (0600–1400) | 26.5 (15.0–37.9) | – |
|
| ||
| Evening (1400–2200) | 43.2 (37.7–48.7) | 16.7 (7.8–25.4) min longer than day shift |
|
| ||
| Night (2200–0600) | 68.9 (53.6–84.2) | 25.7 (6.1–45.2) min longer than evening shift; 42.4 (16.2–68.6) min longer than day shift |
|
| ||
*tMD: time to physician (in min).
**CI: confidence interval.